Final answer:
ST-T wave abnormalities in an ECG can result from myocardial infarction, hypoxia, and chamber enlargements, among other causes.
Step-by-step explanation:
ST-T wave abnormalities can be caused by myocardial infarction (MI), hypoxia, enlargement of ventricles, or atria. An ECG (electrocardiogram) provides a comprehensive picture of cardiac function through measures like the P wave, QRS complex, and T waves.
An amplified P wave indicates atrial enlargement, while an enlarged Q wave can suggest a myocardial infarction. Insufficient oxygen delivery to the myocardium usually results in flatter T waves. ST-segment elevation above baseline is commonly seen in acute myocardial infarction, whereas ST depression can signal hypoxia. Moreover, various cardiac arrhythmias such as ventricular tachycardia or fibrillation also manifest unique ECG abnormalities.